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Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Fix use-after-free on USB disconnect After powerz_disconnect() frees the URB and releases the mutex, a subsequent powerz_read() call can acquire the mutex and call powerz_read_data(), which dereferences the freed URB pointer. Fix by: - Setting priv->urb to NULL in powerz_disconnect() so that powerz_read_data() can detect the disconnected state. - Adding a !priv->urb check at the start of powerz_read_data() to return -ENODEV on a disconnected device. - Moving usb_set_intfdata() before hwmon registration so the disconnect handler can always find the priv pointer.

PUBLISHED Reserved 2026-03-09 | Published 2026-04-24 | Updated 2026-04-27 | Assigner Linux

Product status

Default status
unaffected

4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before c78e1d4e48f23792adaa7c94251e22b0d9700a39
affected

4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before 9e1b798257f96d2e2a2639830eb71add545ce749
affected

4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before 7003ae4810ca83f0ddca85b768500e313c4b998c
affected

4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before 61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4
affected

4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before 08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4
affected

Default status
affected

6.7
affected

Any version before 6.7
unaffected

6.12.83 (semver)
unaffected

6.18.24 (semver)
unaffected

6.19.14 (semver)
unaffected

7.0.1 (semver)
unaffected

7.1-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/c78e1d4e48f23792adaa7c94251e22b0d9700a39

git.kernel.org/...c/9e1b798257f96d2e2a2639830eb71add545ce749

git.kernel.org/...c/7003ae4810ca83f0ddca85b768500e313c4b998c

git.kernel.org/...c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4

git.kernel.org/...c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4

cve.org (CVE-2026-31582)

nvd.nist.gov (CVE-2026-31582)

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